Automatic nipper temple for weaving looms



Dec. 12, 1961 c. MASOLO AUTOMATIC NIPPER TEMPLE FOR WEAVING LOOMS Filed May 5. 1959 CARLO MAsoLo INVENTOR.

,ffi MGE NT atent ace Patented Dec. 12, 1961 3,012,537 AUTOMATIC NIPI'ER TEMPLE FOR WEAVING LOOMS Carlo Masolo, Desio, Italy Dr. G. Modiano, Via Meravigli 16, Milan, Italy) Filed May 5, 1959, Ser. No. 811,111 (Ilaims priority, application Italy May 5, 1958 11 Claims. (Cl. 139-293) This invention relates to temples for transversally stretching a web during the weaving thereof by means of a loom.

Temples are known by means of which attempts have been made to eliminate the shrinkage of the web in the direction of its width, during the weaving operation. As is known, the shrinkage of the web is caused by the weft yarns which are compelled to assume a sinuous form when interweaved with the warp yarns.

The known temples are usually constituted of a number of skew rolls provided on their outer surface with thin metallic pins on which the web hook during the weaving thereof on the loom. I

The drawbacks of the known temples are due to the fact that it is not possible to obtain by means of such temples a regular web, since the latter will always present more or less perceptible marks, rubs or punctures caused by the thin pins of these temples.

On the other hand, with the known temples it is not possible to eliminate always in a satisfactory manner the transversal shrinkage of the web.

An object of the present invention is, therefore, to provide a temple capable of eliminating in an automatic and satisfactory manner the transversal shrinkage of the web, woven on a loom, without leaving any trace on the woven web.

Another object of the present invention i to provide a temple which may be employed for any web type whatsoever which is woven on a loom.

Another object of the invention is to provide a temple which may be readily mounted on existing looms.

A further object of the invention is to provide a temple constituted of few and simple elements which may be easily manufactured and are obtainable at a low cost.

Another object of the invention is to provide a temple the elements of which are adjustable in order to adapt conveniently the temple to a particular loom and web.

Another object of the invention is to provide automatically operated temples, mounted on a 100m at both selvage sides of a web to be woven on the loom, which, besides being adapted to maintain the web stretched in a transversal direction, are capable of cutting simultaneously the residual fringelike weft-thread lengths left by the I 7 shuttle on the selvage of the web.

cording to the invention by means of a nipper temple for maintaining the web transversely stretched which is mounted at the selvage side of the web on a loom having a slay and a reed, and which cooperates with a symmetrically arranged temple at the opposite selvage side of that web, such temple being mainly characterized in that it is constituted of a nipper device comprising a first jaw member adjustably fastened on a loom, a second jaw member hinged on said first jaw member and urged by spring means towards the first jaw member, a plurality of levers transmissively connected one with the other and with the temple members, at least one of these levers having an element capable of receiving an impact from the slay of the loom and at least another lever being transmissively and adjustably connected to the movable jaw member, so that the impact displacementof the slay will be transmitted through said plurality of levers to the movable jaw member for intermittently separating an end of said movable jaw member from a corresponding end of the stationary jaw member so that each nipper temple will be opened for a Short instant to allow the advancing of the web and will be closed by resilient means immediately after the slay has moved from its extreme forward position whereby the nipper temples will clamp the web at its selvages.

The temple according to the invention will now be more fully described with reference to certain embodiments of the invention, given only by way of non-limitative example, illustrated in the drawing in which:

FIG. 1 is a plan view of an embodiment of the invention,

FIG. 2 is a sectional view along the line 22 of FIG. 1,

FIG. 3 is a top view of a modified lever member of a temple according to the invention, and

FIG. 4 is a lateral view of another embodiment of the invention in which the temple, modified as in FIG. 3, is provided with a cutting device,

FIG. 5 is a front elevational view of the modification shown in FIGS. 3 and 4.

As shown in the drawing, the temple comprises a fixed jaw 1 whose enlarged hub-like rear part 2 is mounted through a supporting pin on the loom, which is not shown in the figure, the supporting pin fitting within a throughgoing hole 3 of the part 2 on which a setscrew 4 is provided for fastening the jaw 1 on the supporting pin in an exact desired position with respect to the loom. The connection between the supporting pin and the loom itself may, preferably, be made by means of an elastically slidable joint 50, which maintains the temple in its position through a spring, the strength of which may be calculated and regulated in a manner to prevent the retrccession of the temple-supporting pin when the reed, in the proximity of which the temples are mounted, presses the weftv against the web and thereby against the temples, such connection at the same time allowing an elastical retraction of the temples when the shuttle accidentally stops between the reed and the temples, as a consequence of a break-down in the operation, and is struck by the reed and. pushedagainst the temples which will then elastically withdraw so as to avoid a breaking or damaging of these members. The above-mentioned elastically slidable joint has been illustrated at 50 in FIG. 2.

The upper jaw 1 has an arm 5 with a channel-shaped profile in which a throughgoing slot 6 is cut out and which bears as an integral part thereof a clamping pad 7 covered'with a lining 47 of rubber or similar, elastomeric materials which is bonded to a plate of metal or plastics secured by inturned edgeswithin lateral notches of the clamping pad.

The movable lower jaw 8 is hinged at 13 on the hub 2 of the upper jaw 1 and is. provided with a throughgoing slot 9 and a recess 10 on the bottom of which a plate '11 is fastened which may be made of a hard steel having a smooth surface to afford a long-wearing low-friction contact surface for a roller 12. The free end of the jaw 8 is made in thetform of a clamping pad 14 which is likewisely covered by a lining 48 of rubber or similar elas'tomeric materials in the same manner as the clamping pad 7. 7 Both the clamping pad 7 and the clamping pad 14 extend for a considerable distance in a direction transversal to the jaws, as seen in FIG. 1, in order to clamp a substantial length of the web between them.

On the upper part of the clamping pad 7 a lever 16 is hinged at 15, this lever being slightly curved and provided with a throughgoing slot 17 which extends along a substantial part of the length of the lever 16. Arms 19, 19' supporting the roller 12 are rigidly but adjustably connected to the lever 16, by means of the screws 18, 18. The arms 19, 19' are slightly inclined with respect to the perpendicular of the movable jaw 8 and the lever 16 and by means of the screws 18, 18 it is possible to adjust the amount of this inclination so as to regulate in this way the opening of the jaws. It will be apparent that an increased inclination of the arms 19, 19 will reduce the maximum separation of the jaws and vice versa. A cover 20 bears with one end thereof upon the hub 2 of the jaw 1 and with the other end thereof upon the upstanding lugs 7' of the clamping pad 7 which support the hinge pin 15. In its central part the cover 20 has a bore 21 through which passes a screw 22, which is provided with a long stem traversing also the holes 6 and 9 of the fixed jaw 1 and the movable jaw 8, respectively. and the hole 23 of an arcuate leaf spring 24 by means of which the nut 25 of the screw 22 presses the clamping pad 14 of the movable jaw 8 against the clamping pad 7 of the fixed jaw 1.

By means of the nut 25 of the bolt 22 it is possible to vary the tension of the spring 24 and to adjust in this way the clamping pressure of the jaws.

The lever 16 has at its free end three gear teeth 26 meshing with two gear teeth 27 of a lever 28 which is bent approximately through an angle of 90 and which is hinged at 29 on the hub 2 of the fixed jaw 1. At its free end the lever 28 is provided with a hub enlargement 39 having a threaded bore 31, the axis of which extends approximately in the longitudinal direction of the jaws. Into the hole 31 a threaded pin 32 is screwed the head 32' of which is made in the form of a bumper for conveniently absorbing the impact of the slay of the loom which is not represented in the figure.

FIG. 4 shows a cutting device which may be laterally mounted on a slightly modified embodiment of the temple according to the invention and is constituted by a movable blade 33 provided with a slot 34 through which the movable blade 33 is guided, by means of a threaded pin 35, in a reciprocating motion. The threaded pin 35 is laterally screwed onto the fixed jaw 1 and fastens two stationary blades 36 which are rigidly secured to the fixed jaw 1.

The stationary cutting blades 36 are laterally slightly separated from one another and in the interspace between the blades 36 the movable cutting blades 33 is slidably arranged. The screw 37 serves as a sliding support for preventing any lateral bending of the two cutting blades 36 and of the movable cutting blade 33, the slot 38 of the fixed blades 36 allowing the reciprocating movement of the screw 37 which is screwed into a corresponding bore of the movable jaw 8.

The movable cutting blade 33 is actuated by means of a transmission lever 39, which is hinged at 40 with one end thereof on the fixed jaw 1 while the other end of the lever 39 is connected through a slack-sliding hinged connection 41 with the movable cutting blade 33. On its central part the lever 39 is provided with a slot 42 which, together with a pin 43 on a modification 16 (FIG. 3) of the lever 16, forms a sliding hinged connection between lever 16 and lever 39. The pin 43 is fastened by screw and nut means within a longitudinal slot 43 of the lever 16'. Owing to the accommodation of the pin 43 within an elongated slot 43, the fixed position of the pin 43 may be adjusted in the longitudinal direction of the lever 16', so that the pin 43 may be displaced towards or away from the fulcrum 40 of the lever 39 for increasing or reducing the reciprocating stroke of the cutting blade 33. A wire spring 44 is removably secured with its coil 45 and with its end 46 on the stationary jaw 1, and its other end 47 urges the lever 39 upwardly to obtain a tight contacting engagement between the element of the linkage connected with cutting blade 33.

The operation of the device is as follows:

Shortly before the reed presses the weft yarn against the web, the slay strikes the buffer head 32 of the threaded pin 32 compelling the lever 28 to rotate in the direction of the arrow A about the fulcrum 29 and to depress the toothed end of the lever 16 or 16 as the latter rotates about the fulcrum 15 together with the arms 19, 19 which, through the roll 12, displace the movable jaw 8 downwardly so that the clamping pads 7 and 14 will open and release the web allowing thus the advancement thereof. Immediately after the insertion of the weft yarn has occurred and the slay has moved away from the bumper head 32 of the pin 32, thus the spring 24 will press the movable jaw 8 against the stationary jaw 1 so that the web will be clamped by the pads 47, 48 of the jaws whereby transversal shrinkage of the web will be prevented by the cooperation of a symmetrically arranged identical nipper temple on the opposite selvage side of the web.

Owing to the inclination of the arms 19, 19 the roller 12 slightly rolls on the plate 11 during the closure and the opening of the jaws.

It will be obvious that when the web is advancing the nipper temple according to the invention is opened so that no rub will take place, and in the closed position the web will not be damaged thanks to the rubber lining 47 and 48.

The temples according to the invention are mounted at both selvage sides of the web and normally the temple which is arranged on the change side of the loom is provided with a cutting device as shown in FIG. 4, while the other temple at the opposite side of the loom has no cutting device.

In practice it has been found that a diameter of 13 mm. of the hole 3 of the fixed jaw 1 is a convenient size for the supporting pin to fit therein.

It has been also found in practice that a convenient operation is obtained when the minimum distance between the temples and the reed is not less than 2 mm.

The web which is intermittently clamped by the nipper temples maintains unchanged its Width since the movement of the temples occurs only when the slay arrives in its extreme forward position.

In practice the device according to the invention clamps the web approximately 140460 times per minute.

It is to be understood that the described temple may be subjected to modifications without departing from the scope of the invention.

From the above description of my invention it will become apparent that the same fulfills all the objects recited heretofore and while I have described my invention in considerable detail, I do not wish to be limited in my protection to such detail, except as may be necessitated by the appended claims.

I claim:

1. A temple for a loom having a reciprocating slay, comprising a fixed jaw, a movable jaw pivoted to said fixed jaw, spring means anchored to said jaws and tending to keep them closed, a lever pivoted to said fixed jaw at a location opposite said movable jaw, said fixed jaw being provided with a cutout, an operating member extending from said lever through said cutout and engaging said movable jaw for separating it from said fixed jaw against the force of said spring means upon a pivotal movement of said lever in a predetermined sense, and an actuating element displaceably supported on said fixed jaw, said element forming an abutment in the path of said slay and being coupled with said lever for moving it in said sense upon being displaced from a normal position by the impact of said slay.

2. A temple according to claim 1 wherein said mov' able jaw is provided with a stem traversing said cutout, said spring means bearing upon said stem at a location beyond said fixed jaw.

3. A temple according to claim 2 wherein said lever is provided with a slot, said stem further passing through said slot and being engaged by said spring means at a location beyond said lever.

4. A temple according to claim 1, further comprising a pair of resilient pads carried on the co-operating faces of said jaws.

5. A temple according to claim 1, further comprising a pair of co-operating cutters positioned adjacent an edge of said jaws, and coupling means respectively connecting said cutters with said fixed jaw and with said lever.

6. A temple according to claim 1 wherein said operating member includes a pair of parallel arms secured to said lever at an adjustable angle of inclination with respect to said movable jaw.

7. A temple according to claim 6 wherein said operating extremity member is provided with a roller journaled between said arms, said movable jaw having a hearing surface engaged by said roller.

8. A temple for a loom having a reciprocating slay, comprising a fixed jaw, a movable jaw pivoted to said fixed jaw, spring means anchored to said jaws and tending to keep them closed, a first level pivoted to said fixed jaw at a location opposite said movable jaw, said fixed jaw being provided with a cutout, an operating member extending from said lever through said cutout and engaging said movable jaw for separating it from said fixed jaw against the force of said spring means upon a pivotal movement of said lever in a predetermined sense, and a second lever supported on said fixed jaw for swinging movement about a pivot remote from that of said first lever, said second lever forming an abutment in the path of said slay and-being coupled with said first lever for moving it in said sense upon being displaced from a normal position by the impact of said slay.

9. A temple according to claim 8 wherein said levers are provided with meshing gear teeth coupling them for simultaneous displacement. p

10. A temple according to claim 8, further comprising a pair of co-operating cutters positioned adjacentan edge of said jaws, and coupling means respectively connecting said cutters with said fixed jaw and with said first lever.

11. A temple for a loom having a reciprocating slay, comprising a fixed jaw, a movable jaw pivoted to said fixed jaw, spring means anchored to said jaws and tending to keep them closed, a lever pivoted to said fixed jaw, an operating member extending from said lever and engaging said movable jaw for separating it from said fixed jaw against the force of said spring means upon a pivotal movement of said lever in a predetermined sense, an actuating element displaceably supported on said fixed jaw, said element forming an abutment in the path of said 1 slay and being coupled with said lever for moving it in said sense upon being displaced from a normal position by the impact of said slay, a pair of co-operating cutters positioned adjacent an edge of said jaws, and coupling means respectively connecting said cutters with said fixed jaw and with said lever.

References Cited in the file of this patent UNITED STATES PATENTS 

